Mexico, USA & Canada
Family - HESPERIIDAE
© Frank Model
In the Americas there are 2365 known species of
Hesperiidae. These are split into 5 subfamilies i.e. Pyrrhopyginae,
Heteropterinae, Megathyminae, Pyrginae and Hesperiinae.
Hesperiines of which there are about 1040 species, are known as
Grass Skippers because their larvae feed on grasses, bamboos and
All members of the subfamily Hesperiinae are sexually dimorphic -
males being distinguished by the presence of a dark streak of
androconial scales on the upperside of the forewing.
The genus Euphyes comprises of 21
species, distributed variously from Canada to Paraguay. Most species
have dark earthy brown uppersides with cream or yellowish spots and
streaks, although a few species are unmarked. The undersides also
vary quite a lot, some species being pale earthy brown and devoid of
markings, while others have a series of pale post-median spots.
Several have yellowish or fuscous undersides with the veins mapped
in yellow. Three of these have long yellow streaks on the underside
bayensis and dion.
Euphyes dion is confined to the eastern
states of the USA.
This species can be found in damp habitats where sedges grow,
including meadows and fields, bogs, woodland glades, roadside
ditches and streamsides.
The egg is pale green, and laid singly on
Carex blades ( Cyperaceae ). The larva is dull translucent
green with a thin dark mid-dorsal line. Its head is white, with a
black spot on the crown, and orange vertical stripes. It feeds
nocturnally and lives in a shelter constructed by folding and
silking a leaf. The larva moves to a new shelter after each moult,
and pupates in the final shelter.
perch on grasses and sedges which they use as lookout posts from which
to survey passing females. Males imbibe at puddles and stream edges.
Both sexes nectar at Lamiaceae, Asteraceae and other flowers.